Bosch 16861 Oxygen Sensor - Upstream

Overview of Bosch Actual OE Oxygen Sensor 16861

The Bosch Actual OE Oxygen Sensor 16861 is designed for precise emission control in select Cadillac, Chevrolet, Pontiac, and Suzuki vehicles. This narrow-band heated oxygen sensor ensures accurate air-fuel mixture readings to maintain optimal engine performance and emissions compliance.

• Specific fit for Cadillac CTS, SRX, STS; Chevrolet Equinox; Pontiac Torrent; Suzuki XL-7
• Heated narrow-band oxygen sensor for improved response time
• 12.1-inch wiring harness length with 4 wires and blade terminals
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Durable metal housing finished in steel with a square male connector
• Standard replacement grade with included wiring harness

Detailed Features and Specifications

This Bosch oxygen sensor (part number 16861) features a 4-wire configuration with blade-type terminals and a male connector designed for specific vehicle applications. The sensor is heated to provide faster warm-up times, which helps the engine control unit (ECU) adjust fuel delivery more efficiently. The threaded mounting type with an 18 mm diameter and 22 mm hex size allows for secure installation in the exhaust system. The wiring harness length of 12.1 inches and overall length of 15.5 inches provide adequate reach for proper connection without excess slack. The sensor’s metal housing ensures durability under high-temperature conditions common in emission control systems.

About the Bosch Actual OE Oxygen Sensor Product Line

The Actual OE Oxygen Sensor line by Bosch is engineered to meet original equipment specifications, providing reliable performance and fitment for specific vehicle models. This product line focuses on delivering sensors that match the exact requirements of the original parts, ensuring compatibility and consistent emission control. The 16861 sensor is part of this line, offering a standard replacement option that maintains factory-level quality and function.

Common Applications and Problem Solving

• Restores accurate oxygen sensing for proper air-fuel ratio management
• Resolves engine performance issues related to faulty oxygen sensors
• Helps reduce emissions and prevent failed emissions tests
• Eliminates rough idling and poor fuel economy caused by sensor failure
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Bosch 16861 oxygen sensor, ensure the vehicle is compatible with this specific part number and fitment. Use a 22 mm oxygen sensor socket for removal and installation. The threaded sensor should be tightened securely to the manufacturer’s torque specifications to avoid exhaust leaks. Verify the wiring harness connections match the original setup, paying attention to the 4-wire blade terminal configuration and male connector orientation. No mounting bracket is included, so use the existing mounting points on the vehicle.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and performance. The Actual OE Oxygen Sensor 16861 is a standard replacement part designed to provide reliable operation consistent with original equipment. While specific warranty details are not provided here, Bosch typically offers limited warranties on their emission control components to cover defects in materials and workmanship.